Resposta :
(5x + 7)²
Use (a + b)² = a² + 2ab + b²
[tex](5x) {}^{2} + 2 \times 5x \times 7 + 7 {}^{2} [/tex]
[tex]25x {}^{2} + 2 \times 5x \times 7 + 7 {}^{2} [/tex]
[tex]25x {}^{2} + 70x + 7 {}^{2} [/tex]
➡️ 25x² + 70x + 49
[tex]Espero \: ter \: ajudado[/tex]
Resposta:
[tex]25 {x}^{2} + 70x + 49 \\ [/tex]
Explicação passo-a-passo:
[tex](5x + 7)^{2} \\ (5x)^{2} + 2 \times 5x \times 7 + {7}^{2} \\ 25 {x}^{2} + 2 \times 5x \times 7 + {7}^{2} \\ 25 {x}^{2} + 70x + {7}^{2} \\ 25 {x}^{2} + 70x + 49[/tex]
[tex]\Large\mathscr{\red{Attard}}[/tex]
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